PHILLIES FILES: Pettibone has setback; Halladay to pitch in Reading

PHILADELPHIA — Jonathan Pettibone had a setback following his rehab outing Tuesday with Triple-A Lehigh Valley.

The Phillies rookie has shoulder soreness (he's on the DL for a right shoulder strain) and will have some tests and an MRI tomorrow, interim manager Ryne Sandberg said.

Roy Halladay, who started for Single-A Lakewood on Tuesday in a rehab outing, will start Sunday for Double-A Reading.

"The only thing that I can say about Doc is his determination and his fire that burns within and his makeup, all that combination and character is the thing that stands out right now," Sandberg said. "Right now, it's a matter of him having his rehab assignments, seeing how things go and seeing how he progresses."